<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
  <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
  <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
  <script src="https://cdn.staticfile.org/jquery/2.1.4/jquery.min.js"></script>
</head>

<body>
  <div id="example"></div>
  <script type="text/babel">
    class Popper extends React.Component {
      constructor(props) {
        super(props);
        this.state = { value: 'dd' };
        this.handleChange = this.handleChange.bind(this);
        this.handleSubmit = this.handleSubmit.bind(this);
      }

      handleChange(event) {
        this.setState({ value: event.target.value })
      }
      handleSubmit(event){
        alert('Your favorite flavor is: ' + this.state.value)
        event.preventDefault();
      }
      render() {
        return (
          <form onSubmit={this.handleSubmit}>
            <label>
              <select value={this.state.value} onChange={this.handleChange}>
                <option value="aa">goole</option>
                <option value="bb">goole1</option>
                <option value="cc">goole2</option>
                <option value="dd">goole3</option>
              </select>
            </label>
            <input type="submit" value="提交" />
          </form>
        );
      }
    }
    ReactDOM.render(
      <Popper />,
      document.getElementById('example')
    );
  </script>
</body>

</html>